221021010021012 has 48 divisors (see below), whose sum is σ = 543369307138560. Its totient is φ = 69730448794848.

The previous prime is 221021010020929. The next prime is 221021010021029. The reversal of 221021010021012 is 210120010120122.

It is a junction number, because it is equal to n+sod(n) for n = 221021010020982 and 221021010021000.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 455726778 + ... + 456211505.

It is an arithmetic number, because the mean of its divisors is an integer number (11320193898720).

Almost surely, 2^{221021010021012} is an apocalyptic number.

It is an amenable number.

221021010021012 is an abundant number, since it is smaller than the sum of its proper divisors (322348297117548).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221021010021012 is a wasteful number, since it uses less digits than its factorization.

221021010021012 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 911939372 (or 911939370 counting only the distinct ones).

The product of its (nonzero) digits is 32, while the sum is 15.

Adding to 221021010021012 its reverse (210120010120122), we get a palindrome (431141020141134).

The spelling of 221021010021012 in words is "two hundred twenty-one trillion, twenty-one billion, ten million, twenty-one thousand, twelve".